Draft-equalizer.



W "fz G. s. DUPFIN'.

DRAFT EQUALIZER. APPLICATION FILED JULY 20, 1911.

1 ,040,174. Patented Oct. 1, 1912.

X 2 SHEETS-SHEET 1.

O4.- f /3 IH@ 7 l y o FO] E WITNESSES duf v 5' aww? G. S. DUFFIN.

DRAFT BQUALIZER. APPLICATION FILED JULYzo, 1911.

1,040, 174'.' Patented Oct. 1`, 1912.

2 SHEETS-SHEET 2A WTNESSES /VVE/VOR (UNITED STATES PATENT oFFioii.

GEORGE s. rurrm, or Hoornsroiv, ILLINOIS.

DRAFT-EQUALIZER..

Specification of` Letterslatent.

Applicationled'J'uly 20, 1911. SeriaINo. 639,687;

To allwhom 'it may concern: I Be it known that IGEoRG`E S. DUFFIN, of

. Hoopeston, in the county of Vermilion and g such as are especially adapted for use with sulky plows,-one object of the invention being to so construct and arrange 'the equalizing appliances that certain members thereofA can be superimposed and all connected with the plow frame through the medium of a vertically disposed pivoted lever attached to the plow frame approximately in line with the plow beam` nearest the furrowl wheel.

With this and other objects in view the in* vention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claim.

In the accompanying'drawings, Figure 1 is a plan view illustrating my improvements and the application of the same to a sulky plow. Fig. 2 is a view in section on the line m-fr of Fig. 1, and Fig. 3 is a view illustrating modifications.

1 represents a portion of the frame of a sulky plow and 2-*3 indicate the lines of the v furrow and land wheels respectively.

The forward ends of the beams 4-4 which constitute portions of the plow frame have secured thereto, a clevis bar 5 and from one end of this clevis bar an arm 6 projects laterally beyond the line of the furrow wheel. A forwardly projecting arm 7 is secured to the free end of the arm 6 and a brace 8 extends from the forward end of the armf 7 rearwardly to the front end of the plow frame,-said arms 6 and 7 and the brace 8 constituting a forwardly projecting bracket to one side ofthe plow frame.

A link or clevis 9 is pivotally attached to the clevis bar 5 so as to have horizontal pivotal movement relatively thereto and to the forward end of this clevis or link, a vertically disposed lever 10 is pivotally attached between itsends. A link or clevis 11 is pivoted to the upper end of the lever 10 and is bifurcated to receive a long lever 12 with tween the ends of said lever. otal connection with the link 11, the lever 12 projects to the arm 7 with which it is pivotally connected. The long arm of thel lever 12 extends laterally in the reverse direction and its free end terminates somewhat outside of alinement with the land wheel 3, It will thus be seen that the pivotal connec- 1 tion of the lever 12 with the vertical lever 10 will be approximately in line with the plow beam nearest the furrow wheel and that said' lever 12" is of sufficient length to project. at its ends somewhat beyond the lines of the furrow and land wheels. Near the free end' of the long arm of lever 12', a swingle-tree 13 is connected through the me'- dium of suitable links 14.

To the lower end of the vertically disposed leverlO, a link or clevis 15 (the same H in construction as the link or clevis 11) is .pivotally` attached and to this link orV clevis f' 15, a double-tree 16 is pivotally connected,

Levers 17-17 are pivotally connected between their ends to the doubletree 16 in proximity to the ends of the latter. The long arms of the levers 17 project beyond the ends of the double-tree 16 and have connected therewith, through the medium of links 18, swingle-trees 19. A swingle-tree 20 is located between the swingle-trees 19 and is connected by means of a link 21 with the meeting ends of links 22,-the outer ends of the latter being connected with the short arms of levers 17 near the inner ends of the same.

In the construction shown in Fig. 8, which is adapted for six horses, a lever 23 is substituted for the doubletree 16, which lever is pivotally attached between its ends in bifurcated block 24, the latter being pivoted (at right angles to the pivotal connection therewith of the lever 23) to the lower end of the vertical lever 10. The lever 23 is thus disposed horizontally and is pro-l vided at its respective ends with arms 25-26. A doubletree 27 is connected, by means of a chain or rod 28 with the arm 25 of lever 23 and with said double-tree, two swingle-trees 29 are connected. To the arm 26 of lever 23 a double-tree 30 is connected and this double-tree carries pivoted levers 31, to the outer ends of which latter, swingle-trees 32 are connected. The inner ends of the levers 31 are connected by links 83 and with these links, a swingle-tree 84 Patented Oct. 1, 1912.

which it is pivotally connected at a point'bec From itspivis Connected and disposed betweenv 'theswingle-trees 3l. The draft' devices connected with the lower end of the vertical lever 10, thus accommodate iive horses, the sixth horse being connected with a swingle tree at the free end of the long arm of the lever 12, the same as above described in connection with the construction shown in Figs. 1 and 2.

In the four or six -horse equalizer, the draft attachments for one'horse are located above the draft attachments for three horses in the four horse equalizer and above these for five horses in the siX horse equalizer,

'and in bot-h constructions one horse draft attachment is connected with the upper end of the vertical equalizing lever 10, while the "5 other attachments are all connected with the lower end of the lever. The construction and arrangement of parts is such that the draft strains are transmitted directly through the vertically disposed lever 10 pivoted to the clevis bar rigidly .secured to the forward ends of the plow beams whereby such strains are concentrated at a point approximately in line with the plow beam nearest the furrow wheel and causes the 1%-, plow to run smooth and true. In Otllel" ,Copies of this patent may be obtained for clevis bar at a point in line with the plow beam nearest the furrow wheel, a lever plvoted intermediate its ends to the upper end of said vertical lever and having its short arm pivoted to said bracket, and a swingle tree connected with its long arm, and a double tree pivoted to the lower arm of 2" said vertical lever, and three swingle trees connected with said double tree.

In testimony whereof, I have signed this specification in the presence of two subscriby.

ing witnesses. v y

GEORGE S..'DUFFIN.

Witnesses:

CI-rAs. L. TIL'roN, Evnnn'r'r E. GATES.

iive cents each, by addressing the Commissioner of Yatents. Washington, D. C. 

